单词	ultralow frequency
释义	ultralow frequency noun : a radio frequency in the lower range of the radio spectrum from about 300 Hz to 3 kHz Communicating with subs thousands of miles away, under thousands of feet of ocean, requires ultralow frequencies … Noah Shachtman, Wired, August 2009 —abbreviation ULF see Radio Frequencies Table Word History First Known Use 1994, in the meaning defined above
随便看	akinete aking akinner akinnest Akita akitas Akka Akkad Akkadian akkadians akkerman akkum Aklan aklanon aklanons aklans akle akmola akmolinsk akolouthia akoluthia akoluthic Akontae akori akosmism

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